Pinch of Herbes de Provenance
A few fresh basil leaves - for Italian dishes such as meatballs with spaghetti
A pinch of chilli flakes for linguine with crab or lobster or spaghetti with meatballs

Method
Heat the oil in a pan and add the onion and sauté or cook without colouring for 5 minutes.
Add the garlic and cook for 2 minutes.
Raise the heat, add the wine and reduce until no liquid remains.
Add the tomatoes, bouillon and bay leaf. Reduce the heat, cover the pan and simmer VERY, VERY and in a covered pam, slowly for 30 minutes. If the mixture appears to stick add a little water.
Remove the bayleaf and process the mixture using a stick blender or liquidiser.

Taste and season and add additional ingredients to give an Italienne sauce (basil), chopped black olives to serve with chicken (Cacciatore) or to use to as the cooking medium for chicken pieces as in a casserole or add an anchovy filet or two to have a sauce on which one can oven cook a cod, marlin or salmon steak etc.

Tomato paste is added to sauces, such as Espagnole, for example, or tomato sauces etc., to intensify flavour, not reduced by adding water to give a sauce. Reducing the product by adding water is simply creating a hot tomato liquid and one which will be badly flavoured, IMHO! and not a sauce.

There are varying amounts given for the substitution. Basically you can stir water into tomato paste until you have the sauce concsistency you're looking for. If it thickens too much while cooking, add water as needed

Sorry Ladycook,

Adding 1 1/2 cans of water to 1 (6 oz) can of tomato paste does not a tomato sauce make. All you do in this relationship between water and tomato paste is thin the tomato paste. You do not make a sauce and saying - season as desired, is of little help or culinary merit, IMHO!

When I make tomato sauce I buy crushed tomatoes in tomato puree. I do keep a couple of cans of tomato paste on hand. I rarely (make that almost never) by commercial sauce, and only use paste if I cannot get a sauce to thicken. I look on the can, too, and don't care for products that are too sweet. I like the tart edge that tomatoes have so avoid products that have sugar as a main ingredient.